Paint compound.



UNITED STATES ATENT OFFICE.

CHARLES J. BRUCE, OF BOSTON, MASSACHUSETTS.

PAINT COMPOUND.

SPECIFICATION forming part of Letters Patent No. 632,095, dated August29, 1899. Application filed February 20, 1899- Serial No. 706,104. [Nospecimens.)

T0 aZZ whom it may concern.-

Be it known that 1, CHARLES J. BRUCE, of Boston, in the county ofSuffolk and State of l\lassachusetts, have invented certain new anduseful Improvements in Paint Oompounds,0f which the followingis adescription sufliciently full, clear, and exact to enable those skilledin the art to which it appertains or with which it is most nearlyconnected to make and use the same.

This composition for a flexible and elastic paint for the surfaces ofwood, iron, tin, stone, plaster, canvas, 850., consists of the followingingredients,combined in substantially the following proportionsnamely,four pounds sulfate of zinc (crude) dissolved in one gallon of water,one gallon paint composed of a suitable pigment and oil-vehicle, oneounce glucose, one-quarter ounce dextrin, one-quarter ounceparaffih-wax, two ounces spirits of turpentine, and one-eighth ouncecitronella. These ingredients are prepared and com pounded by dissolvingthe crude sulfate of zinc and dextrin in one gallon of soft hot wa ter,which is allowed to stand until the sediment contained therein settlesat the bottom, when the clear solution is poured into another vessel foruse, the sediment being unused. This clarified solution is slowlystirred into the one gallon of ordinary oil-paint until the two areperfectly combined. The paraffin-wax is then dissolved in the spirits ofturpentine by agitating them together in any suitable way, as by shakingthem in a bottle, and these ingredients are then mixed with the glucoseand citronella and subsequently thoroughly stirred into thepartially-prepared paint mixture.

I am aware that it has been proposed to mix a watery solution of thesulfate of zinc with oil-paints and that it is old to add glucose anddextrin to paint mixtures, but this I disclaim, broadly, since none ofthe compounds using ingredients of the kind mentioned, so far as I amaware, constitute a mixture capable of producing apaint having the highdegree of flexibility and elasticity which my paint possesses and whichresults from the composition of the ingredients pointed out by me andwhich are combined substantially as specified.

Before applying the paint the surface may be treated with any suitablepriming, and when the painthas been applied and becomes dry it may, ifdesired, be decorated on its surface and the whole covered with anysuit-.

able transparent varnish or other'suitable finish.

This paint has been found to be flexible and elastic to quite anappreciable extent, and yet to well withstand such exposure as that towhich paints are commonly subjected.

The glucose, paraffin-wax, and dextrin are added to the compound inorder to temperit, as it were, to suit different conditionsthat is, tomake enduring and serviceable under varying conditions of heat, cold,moisture, &c.and these ingredients have been found useful and necessaryfrom practical experience.

Having thus fully ascertained the nature of the invention and the mannerofcompounding it, it is declared that what is claimed is- Theherein-described composition of mat ter, forming a flexible and elasticpaint, consisting of clarified solution sulfate zinc (crude), solutionof dextrin, water, oil-paint, glucose, paraffin wax, spirits ofturpentine, and citronella, in substantially the proportions specified.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 30th day of January, A. D.1899.

CHARLES J. BRUCE,

Witnesses:

JOHN A. BROWN, A. LOUISE OoLLINs,

